I was on Atenolol 25 mg 1 x day for 20 years for moderate hypertension but it wasn t working well any more so internist changed me to Metoprolol 50 mg 1 x day rather than raise Atenolol dose due to market shortage. After 5-month trial of Metoprolol it isn t controlling my BP---it is volatile and runs between high 165/95 and low 85/50. Mostly very low readings are the problem so I am exhausted and faintish and I am troubled by other side effects. MD said she is phoning in RX for me to switch to Amlodipine 2.5 mg (from which we surely will titrate as we did with Metoprolol) but said nothing about transitioning from Beta blocker to Calcium channel blocker. I am reading that stopping a Beta blocker abruptly can be dangerous and that perhaps I should taper off the Metoprolol before starting the Amlodipine. This doctor is new to me and she seems bored. I have no idea how to handle transition between these two classes of drug. Thank you.